CrypticQuery Posted December 8, 2010 Share Posted December 8, 2010 Hi again everyone , I've got a quick question about the wonderful world of amperes . I have a device that has a capacity of 2000mA. I would like to charge it with a USB to AC charger with 1000mA. Is it safe to charge that device with the lower amp charger? Thanks in advance! Link to comment Share on other sites More sharing options...
Sabre Posted December 8, 2010 Share Posted December 8, 2010 Details?What is the scenario exactly? Link to comment Share on other sites More sharing options...
Thu'um Posted December 8, 2010 Share Posted December 8, 2010 Details?What is the scenario exactly?Alright, we need to deactivate a bomb on a passanger air liner. Do you think it'll work? :trollface: Link to comment Share on other sites More sharing options...
CrypticQuery Posted December 8, 2010 Author Share Posted December 8, 2010 Details?What is the scenario exactly?I'm attempting to charge a handheld with a Lithium Polymer battery that has a capacity of 2000mAh that normally receives its power from a USB port. I'd like to use an USB to AC adapter (1000mA) to provide power from a regular wall socket. With the conflicting Amperes, I'd like to know if it was safe to charge using that adapter. Apologies if this still doesn't make much sense; I barely understand what I'm typing .Alright, we need to deactivate a bomb on a passanger air liner. Do you think it'll work? < All I'll say Link to comment Share on other sites More sharing options...
Sabre Posted December 8, 2010 Share Posted December 8, 2010 While I can confirm without the componants, I'm guessing it would be safe. I'd wait for a second opinion, but if it's an adapter then I think it would manage. That's why they call them adapters. Link to comment Share on other sites More sharing options...
CrypticQuery Posted December 8, 2010 Author Share Posted December 8, 2010 While I can confirm without the components, I'm guessing it would be safe. I'd wait for a second opinion, but if it's an adapter then I think it would manage. That's why they call them adapters.Thanks for the quick replies and info Sabre! :P Link to comment Share on other sites More sharing options...
Matrilwood Posted December 8, 2010 Share Posted December 8, 2010 Yes it will work, yes it can be dangerous, yes it is illegal to a certain extent. If you have a house-fire and they find that you have one of those adapters, your house insurance is null and void, so dispose of it once you're finished and if you DO have a house fire, get rid of it ASAP (Drive down the road and give it a shallow grave, don't worry if they find it, they're not going to do DNA scans to find the murderer of an AMP adapter) Link to comment Share on other sites More sharing options...
CrypticQuery Posted December 8, 2010 Author Share Posted December 8, 2010 Yes it will work, yes it can be dangerous, yes it is illegal to a certain extent. If you have a house-fire and they find that you have one of those adapters, your house insurance is null and void, so dispose of it once you're finished and if you DO have a house fire, get rid of it ASAP (Drive down the road and give it a shallow grave, don't worry if they find it, they're not going to do DNA scans to find the murderer of an AMP adapter) I'm honestly not sure how to respond to this........sounds a bit ridiculous over a USB to AC adapter from Radioshack and a lithium polymer battery....... Link to comment Share on other sites More sharing options...
Sabre Posted December 8, 2010 Share Posted December 8, 2010 I doubt that would happen. Most likely outcome would be a blown fuse or the machine would melt. A fire would require neglect or faulty electrics. Also burring it is a bit extreme. Pop it in a bin of someone else would be enough. Link to comment Share on other sites More sharing options...
CrypticQuery Posted December 8, 2010 Author Share Posted December 8, 2010 I doubt that would happen. Most likely outcome would be a blown fuse or the machine would melt. A fire would require neglect or faulty electrics. Also burring it is a bit extreme. Pop it in a bin of someone else would be enough.So......to avoid a failure of any kind, the adapter should have a higher mA number than the device being charged by it? (if I understand correctly) Link to comment Share on other sites More sharing options...
Sabre Posted December 8, 2010 Share Posted December 8, 2010 I can't confirm that, not without the device.As a rule, devices use X amp, volts, whatever. They will all use the same power. Some of them have the adapter inside and just use a kettle plug (ps2 for example) or have an exturnal adaptor (like the xbox 360).If your device is a plug-usb adaptor, chances are it will make it so that the 'out' end will be putting out the max of what a USB can do.That said, I'd need the device to confirm, but unless the adaptor is home made or from abroad, it should be fine. Link to comment Share on other sites More sharing options...
CrypticQuery Posted December 8, 2010 Author Share Posted December 8, 2010 I can't confirm that, not without the device.As a rule, devices use X amp, volts, whatever. They will all use the same power. Some of them have the adapter inside and just use a kettle plug (ps2 for example) or have an exturnal adaptor (like the xbox 360).If your device is a plug-usb adaptor, chances are it will make it so that the 'out' end will be putting out the max of what a USB can do.That said, I'd need the device to confirm, but unless the adaptor is home made or from abroad, it should be fine.Thanks for the continued support Sabre, and I'm almost certain that the device I'm referring to is a plug-in USB. On the charging cable, it has a proprietary input, but a USB output, and I'll [hopefully] be using USB to AC adapter that plugs straight into a wall socket to charge it. Link to comment Share on other sites More sharing options...
Sabre Posted December 8, 2010 Share Posted December 8, 2010 In that case, assuming it can be changed by USB normally, you should have problems. Keep an eye on it though just in case. Link to comment Share on other sites More sharing options...
DZComposer Posted December 8, 2010 Share Posted December 8, 2010 Amperage is a tricky beast. Firstly, are you sure you're talking thousands of milliamps? USB normally puts out 5 volts at 100mA with peaks at 500mA.If you have a circuit that requires 2000 mA to operate, only providing it with 1000mA likely will result in degraded performance of the circuit, and the current may even be too low to make it through all loads. Likely won't cause permanent damage, though.On the otherhand, providing a 1000 mA circuit with 2000 mA will likely result in smoke, the nasty smell of burnt silicon, the loss of the device, and possibly a fire.There are other factors to consider, as well. Ohm's Law describes the relationship between current, voltage, and resistance. Resistance is determined by the circuit, voltage and amperage can differ depending on the input. Feed a battery the wrong voltage, and you have a fire.In all seriousness, though, don't fuck around with this. Current above 100mA is lethal if it crosses your heart (amps kill, not volts). If you're thinking about hacking up an old power adapter in a jury rig, don't do it.But, if the adapter has the proper USB connector, and the device is a true USB-spec device, 100mA should be fine. Though the device may not enter charging mode. Link to comment Share on other sites More sharing options...
CrypticQuery Posted December 9, 2010 Author Share Posted December 9, 2010 Thanks DZ, and you are definitely right about the 500mA output; the previous specs I had were wrong. Thanks again! :P Link to comment Share on other sites More sharing options...
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